Meyers, Stephen C. , Liston, Aaron , Meinke, Robert J. .
The hybrid origin of Fritillaria gentneri Gilkey (Liliaceae).
FRITILLARIA gentneri Gilkey (Liliaceae) is endemic to oak woodlands of Jackson and Josephine counties in southwestern Oregon and has recently been reported from Siskiyou county, northern California. The species is listed as endangered by both federal and state agencies. Populations of F. gentneri are often found in close proximity to populations of both F. affinis and F. recurva. Furthermore, floral morphology of F. gentneri appears intermediate to that F. affinis and F. recurva, suggesting that F. gentneri may be of hybrid origin. To evaluate this hypothesis, we sequenced the nuclear ribosomal internal transcribed spacer (ITS) and chloroplast psbA - trnH spacer regions. We sampled individuals from four populations where the three species are sympatric. Based on superimposed nucleotide additivity patterns (SNAPs) in the ITS sequences, our results indicate that F. gentneri is a hybrid of F. affinis and F. recurva. In addition, both nuclear and chloroplast sequences suggest that separate hybridization events, leading to the origin of local F. gentneri populations, have occurred on multiple occasions.
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1 - Oregon State University, Department of Botany & Plant Pathology, 2082 Cordley Hall, Corvallis, Oregon, 97331-2902, USA
rare plant conservation
Presentation Type: Oral Paper:Papers for Topics
Date: Tuesday, August 1st, 2006
Time: 10:45 AM